402026369 has 2 divisors, whose sum is σ = 402026370. Its totient is φ = 402026368.

The previous prime is 402026351. The next prime is 402026389. The reversal of 402026369 is 963620204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 318979600 + 83046769 = 17860^2 + 9113^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402026369 is a prime.

It is a super-2 number, since 2×402026369² = 323250402742648322, which contains 22 as substring.

It is a Chen prime.

It is equal to p_21438509 and since 402026369 and 21438509 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (402026389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201013184 + 201013185.

It is an arithmetic number, because the mean of its divisors is an integer number (201013185).

Almost surely, 2^402026369 is an apocalyptic number.

It is an amenable number.

402026369 is a deficient number, since it is larger than the sum of its proper divisors (1).

402026369 is an equidigital number, since it uses as much as digits as its factorization.

402026369 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 32.

The square root of 402026369 is about 20050.5952280724. The cubic root of 402026369 is about 738.0484058163.

The spelling of 402026369 in words is "four hundred two million, twenty-six thousand, three hundred sixty-nine".